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Finding the Fourth Proportional to 142,407.75, 213,471.90 and 79,258.13

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Solution

The fourth proportional to 142,407.75, 213,471.90 and 79,258.13 is: 118,809.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,407.75 : 213,471.90 = 79,258.13 : x
  2. Step 2: Convert to fraction form
    142,407.75/213,471.90 = 79,258.13/x
  3. Step 3: Cross multiply
    142,407.75x = 213,471.90 × 79,258.13
  4. Step 4: Simplify right side
    142,407.75x = 16,919,383,601.55
  5. Step 5: Solve for x
    x = 16,919,383,601.55/142,407.75
  6. Step 6: Final answer
    x = 118,809.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.